Past Simple vs. Present Perfect

Theory:

https://www.etutor.pl/blog/232/Present_Perfect_czy_Past_Simple_-_ktorego_czasu_uzyc.html

Rock your English

Practice:

1. http://testyourenglish.pl/Test/8/present-perfect-czy-past-simple#.YdK2T8nMLak
   
2. https://agendaweb.org/verbs/present-perfect-simple-past-simple-exercises.html
   
3. https://www.e-ang.pl/test,127,Present-Perfect-vs-Past-Simple-I.html
   
4. https://www.ang.pl/cwiczenia/810/present-perfect-zastosowanie
   
5. https://szlifujangielski.pl/ucz-sie/cwiczenia/092-present-perfect-and-past-simple/
   
6. https://test.4free.pl/test/456285/45416
   
7. http://www.focus.olsztyn.pl/gramatyka-present-perfect-test-2.html
8. https://www.e-ang.pl/cwiczenia,11,Present-Perfect-vs-Past-Simple.html